The Håga Mound (Hågahögen) or King Björn's Mound is one of the most magnificent remains from the Nordic Bronze Age. Håga mound is approximately 7 metres high and 45 metres across and it was constructed ca 1000 B.C. by the shore of a narrow inlet of the sea (the land has been continually rising since the Ice Age). It was constructed of turfs that had been laid on top of a cairn which was built on top of a wooden chamber containing a hollow oak coffin with the cremated remains of a short man. During the burial there had probably been human sacrifice, the evidence for which is human bones from which the marrow had been removed.
The coffin contained rich unburnt bronze objects such as a Bronze age sword, a razor, two brooches, a number of thickly gilded buttons, two pincers and various other bronze objects. They may all come from the same workshop in Zealand. The mound was excavated 1902-1903 by Oscar Almgren together with the future king Gustaf VI Adolf. Only minor excavations have been done in the Bronze Age settlement but the area contains several house foundations in stone. The findings from Hågahögen were stored in The Swedish Museum of National Antiquities.
References:Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.